各位，clap 包的命令行参数说明内容很长，怎么设置换行啊？ 类似这种，在下面另起一行，谢谢！

$ demo --help
A simple to use, efficient, and full-featured Command Line Argument Parser

Usage: demo[EXE] [OPTIONS] --name <NAME>

Options:
  -n, --name <NAME>    Name of the person to greet
                       new line xxx  这里怎么实现换行显示
                       other line xxxx
  -c, --count <COUNT>  Number of times to greet [default: 1]
  -h, --help           Print help information
  -V, --version        Print version information